MCQOPTIONS
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MCQOPTIONS
This section includes 1212 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
The chlorophyll molecule is embedded in the core of thylakoid membrane which acts as___________? |
| A. | Hydrophilic |
| B. | Hydrophobic |
| C. | Both of these |
| D. | None of these |
| Answer» C. Both of these | |
| 452. |
The characteristic which enable animals to tolerate dehydration is called__________? |
| A. | Osmoconformation |
| B. | Osmoregulaton |
| C. | Anhydrobiosis |
| D. | Anhydrosis |
| Answer» D. Anhydrosis | |
| 453. |
The cells present in testes and secrete testosterone are___________? |
| A. | Sertoli cells |
| B. | Germinal cell |
| C. | Interstitial cells |
| D. | Spermatocyte |
| Answer» D. Spermatocyte | |
| 454. |
The cell wall of oomycetes is chiefly composed of___________? |
| A. | Chitin |
| B. | Cellulose |
| C. | Lignin |
| D. | Proteins |
| Answer» C. Lignin | |
| 455. |
The cell wall is usually composed of two overlapping halves called epitheca and hypotheca in__________? |
| A. | Diatoms |
| B. | Desmids |
| C. | Pyrrophyta |
| D. | Chlorophyta |
| Answer» B. Desmids | |
| 456. |
The cardio respiratory capacity is related to____________? |
| A. | Strength |
| B. | Flexibility |
| C. | Normal physical endurance |
| D. | Agility |
| Answer» D. Agility | |
| 457. |
The bristles on the body of the cockroach arise from__________? |
| A. | Epidermis |
| B. | Trichogen cell |
| C. | Basement membrane |
| D. | Malpighian cell |
| Answer» C. Basement membrane | |
| 458. |
The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called________? |
| A. | Environmental biology |
| B. | Social biology |
| C. | Human biology |
| D. | Both b and c |
| Answer» C. Human biology | |
| 459. |
The branch of Biology which deals with the use of data and techniques of engineering & technology concerning living organisms is: |
| A. | Human Biology |
| B. | Environmental Biology |
| C. | Genetics |
| D. | Bio-technology |
| Answer» E. | |
| 460. |
The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called ? |
| A. | Environmental biology |
| B. | Social biology |
| C. | Human biology |
| D. | Both b and c |
| Answer» C. Human biology | |
| 461. |
The branch of biology which deals with the study of chemical compounds and the chemical processes in the fliving organisms is called_________________? |
| A. | Chemistry |
| B. | Biochemistry |
| C. | Molocular biology |
| D. | Both a and b |
| Answer» C. Molocular biology | |
| 462. |
The branch in which organism’s life cycle, mode of transmission and interaction with their hosts are studied is: |
| A. | Anatomy |
| B. | Physiology |
| C. | Parasitology |
| D. | Social Biology |
| Answer» D. Social Biology | |
| 463. |
The bond formed when two or more atoms complete their electron shells by sharing electrons is called_____________? |
| A. | Ionic bond |
| B. | Hydrogen bond |
| C. | Covalent bond |
| D. | Electrovalent bond |
| Answer» D. Electrovalent bond | |
| 464. |
The body of ________ is not made of cell. |
| A. | Bacteria |
| B. | Fungi |
| C. | Viruses |
| D. | Algae |
| Answer» B. Fungi | |
| 465. |
The blood enters the ________________ side of heart ? |
| A. | Posterior |
| B. | Anterior |
| C. | Lateral |
| D. | All possible |
| Answer» B. Anterior | |
| 466. |
The biggest group of invertebrates is_________? |
| A. | Worms |
| B. | Insects |
| C. | Jelly fish |
| D. | None of these |
| Answer» C. Jelly fish | |
| 467. |
The basic structural unit of a chromosome is____________? |
| A. | The centromere |
| B. | Nuceleosome |
| C. | Telomere |
| D. | Histone |
| Answer» C. Telomere | |
| 468. |
The average internal temperature of human body is __________? |
| A. | 35 oC |
| B. | 36 oC |
| C. | 37 oC |
| D. | 38 oC |
| Answer» D. 38 oC | |
| 469. |
The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called__________? |
| A. | An organ |
| B. | A molecule |
| C. | Tissue |
| D. | Both a and c |
| Answer» C. Tissue | |
| 470. |
The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called: |
| A. | An organ |
| B. | A molecule |
| C. | Tissue |
| D. | Both a and c |
| Answer» C. Tissue | |
| 471. |
The arrangement of unequal dichotomous branches in one plane during evolution of leaves is called_____________? |
| A. | Overtopping |
| B. | Fusion |
| C. | Webbing |
| D. | Planation |
| Answer» E. | |
| 472. |
The arrangement of ________ speaks of the division of labour within cell? |
| A. | Molecule |
| B. | Subatomic particles |
| C. | Atoms |
| D. | Organelles |
| Answer» E. | |
| 473. |
The arrangement of _________ speaks of the division of labour within cell? |
| A. | Molecule |
| B. | Subatomic particles |
| C. | Atoms |
| D. | Organelles |
| Answer» E. | |
| 474. |
The animals in which coelom is formed due to splitting of mesocerm are known as____________? |
| A. | Pseudocoelous |
| B. | Schizocoelous |
| C. | Enterocoelous |
| D. | Emphicoelous |
| Answer» C. Enterocoelous | |
| 475. |
The air spaces may comprise upto _________ of total volume of leaf surface? |
| A. | 30% |
| B. | 20% |
| C. | 40% |
| D. | 50% |
| Answer» D. 50% | |
| 476. |
The agent of controversial nature causing mad cow infection is_____________? |
| A. | Bacteria |
| B. | Cowpox Virus |
| C. | Adenovirus |
| D. | Prion |
| Answer» E. | |
| 477. |
The active site of an enzyme______________? |
| A. | Never changes |
| B. | Forms no chemical bond with substrate |
| C. | Determined by structure and the specificity of the enzyme |
| D. | They are non specific in their action |
| Answer» D. They are non specific in their action | |
| 478. |
Secretin is a hormone produced by___________? |
| A. | Stomach |
| B. | Liver |
| C. | Pancreas |
| D. | Duodenum |
| Answer» E. | |
| 479. |
Secretin inhibits production of__________________? |
| A. | Gastric juice |
| B. | Pancreatic juice |
| C. | Bile |
| D. | All of these |
| Answer» B. Pancreatic juice | |
| 480. |
Secondary cell wall of sclerenchyma cells is impregnated with_________________? |
| A. | Cellulose |
| B. | Peptidoglycan and murein |
| C. | Lignin |
| D. | Pectin |
| Answer» D. Pectin | |
| 481. |
Second largest phylum of invertebrates is____________? |
| A. | Porifera |
| B. | Arthropoda |
| C. | Mollusca |
| D. | Chordata |
| Answer» D. Chordata | |
| 482. |
Sebum produced from sebaceous glands in a mammal helps in___________? |
| A. | Protection against micro organisms |
| B. | Temperature regulation |
| C. | Excretion |
| D. | All of these |
| Answer» B. Temperature regulation | |
| 483. |
Scurvy and beri – beri and caused by the deficiency of___________? |
| A. | Vitamin B and C |
| B. | Vitamin B and D |
| C. | Vitamin C and B |
| D. | Vitamin A and B |
| Answer» D. Vitamin A and B | |
| 484. |
Scolidon or dog fish belong to the group of fishes called__________? |
| A. | Cartilaginous fishes |
| B. | Bony fishes |
| C. | Running fishes |
| D. | Jawless fishes |
| Answer» B. Bony fishes | |
| 485. |
Sapwood is formed from_____________? |
| A. | Primary xylem |
| B. | Secondary xylem |
| C. | Primary phloem |
| D. | Secondary phloem |
| Answer» C. Primary phloem | |
| 486. |
Salivary glands present in front of ear are___________? |
| A. | Sublingual |
| B. | Submaxillary |
| C. | Submandibular |
| D. | Parotid |
| Answer» E. | |
| 487. |
S-band locomotion is characteristically seen in___________? |
| A. | Bony fish |
| B. | Cartilaginous fish |
| C. | Fish like mammals |
| D. | All fishes |
| Answer» C. Fish like mammals | |
| 488. |
rRNA constitutes ____________% of the total cellular RNA? |
| A. | 3-4 % |
| B. | 10-20% |
| C. | 80% |
| D. | 90% |
| Answer» D. 90% | |
| 489. |
Rose is an example of____________? |
| A. | Hydrophytes |
| B. | Mesophytes |
| C. | Xerophytes |
| D. | Halophytes |
| Answer» C. Xerophytes | |
| 490. |
Roots of a plant show______________? |
| A. | Positive phototropism and negative geotropism |
| B. | Negative phototropism and positive geotropism |
| C. | Negative tactic movement and positive tropic movement |
| D. | Positive geotropism of stem and roots |
| Answer» C. Negative tactic movement and positive tropic movement | |
| 491. |
Root like structure in saprotrophic fungi are called_______________? |
| A. | Rhizodis |
| B. | Haustoria |
| C. | Hyphae |
| D. | Constricting rings |
| Answer» B. Haustoria | |
| 492. |
Robert Hooke discovered_____________? |
| A. | Nucleus |
| B. | Mitochondria |
| C. | Cell |
| D. | DNA |
| Answer» D. DNA | |
| 493. |
Rigor mortis i.e, stiffening of body after death results from__________? |
| A. | Accunulation of rigid proteins molecules in sarcoplam |
| B. | Unavailability of ATP, which is necessary to break the link between actin and myosin. |
| C. | Decrease in body temperature after death. |
| D. | Death of tissue due to unavailability of O2. |
| Answer» C. Decrease in body temperature after death. | |
| 494. |
Rich source of energy in seimen is__________? |
| A. | glucose |
| B. | fructose |
| C. | lactose |
| D. | sacrose |
| Answer» B. fructose | |
| 495. |
Ribosomes and DNA are also present in_________? |
| A. | mitochondria |
| B. | golgi complex |
| C. | endoplasmic reticulum |
| D. | lysosomes |
| Answer» B. golgi complex | |
| 496. |
Ribosomes were discovered by_______? |
| A. | Golgi |
| B. | De Duve |
| C. | Palade |
| D. | R.Brown |
| Answer» D. R.Brown | |
| 497. |
Ribosomes are tiny Granules first studied in 1955 by__________? |
| A. | De-Duve |
| B. | Schwann |
| C. | August Weismann |
| D. | Palade |
| Answer» E. | |
| 498. |
Ribosomes + m-RNA? |
| A. | Polysome |
| B. | Phlosome |
| C. | Polosome |
| D. | None of these |
| Answer» B. Phlosome | |
| 499. |
Ribose is an example of___________? |
| A. | Trioses |
| B. | Tetroses |
| C. | Pentose |
| D. | Hexose |
| Answer» D. Hexose | |
| 500. |
Ribosomes are assembled in__________? |
| A. | Nucleolus |
| B. | Nucleus |
| C. | DNA |
| D. | RNA |
| Answer» B. Nucleus | |